Fig. 5

Histological images of collagen tissue hyperplasia in epidural scar tissue of each group. The collagen tissues in the section stained with Masson shown blue. There was low density collagen in 300 mg/ml suramin-treated group (a), which was significantly lesser than the other groups. Moreover, the density of collagen tissue in 200 mg/ml suramin-treated group (b) was also less than the 100 mg/ml suramin-treated group (c) and saline group (d). The magnification was ×200